<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<script type="text/javascript">
			var a = 0;
			while (a < 3) {
				// console.log(a);
				a++;
			}

			//输出1-100之间的所有数
			var b = 1;
			while (b <= 100) {
				// console.log(b);
				b++;
			}

			//输出1-100之间5的倍数的所有数
			var c = 1;
			while (c <= 100) {
				if (c % 5 == 0) {
					// console.log(c);
				}
				c++;
			}

			//输出1-100之间5的倍数的个数
			var d = 1;
			var count = 0;
			while (d <= 100) {
				if (d % 5 == 0) {
                   count++;
				}
				d++;
			}
			console.log(count);
		</script>
	</body>
</html>
